I don't actually buy that argument that we can not pursue a War in a way in which we refuse to conduct our civil affairs. At the bottom, the sheer simplicity of War: Kill the other MF'er, is not who we as a nation are.
We will have to do things that are unthinkable in the context of our civil liberites as citizens to win this war. Not only that, but it does not mean that we are worse than them; it means that we can be just as ruthless as them, IF THEY FORCE US TOO.
There can only be rules in war if it is a war-game. In War, there are no rules, and if you think there are or should be, then you do not understand what War is.
We killed prisoners, firebombed civilians and launched WMD in WWII, as Americans, and I do not feel one iota of shame for it. We did not start that war and we did not start this one. Caveat emptor, bi-otch.